6-cyl Performance | Forum profile

fuel pressure is fine, tested that a while back when we put a new pump in a couple months back. I will mention to put some cardboard over the radiator. I will have to check on to see if the scan tool is saying what the readout on the dash says. I'm away from that truck right now as it is in Indiana and I am in Ohio till friday.

I have had this code po174 and a mass air sensor code come up recently , cleaned the sensor wires with cleaner and q-tip and cleaned the air filter . 150 miles so far so good . Any ideas what could cause these codes ? Truck still has the original spider injectors .... Bob

Try putting a piece of cardboard over half the radiator to see if the engine will warm up. The only thing I could think of is it's pouring fuel in and cooling off the engine, but that's about absurd for it to be happening. Did the new injector spider come with an adjustable fuel pressure regulator? Have you checked the fuel pressure? Have you pulled the plugs to see if any show irregular fire? It could be the temp sensor is bad, does...